OBD Guide
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P103B

Cylinder 3 Oil Supply Solenoid Valve Driver Open Circuit

P103B is an OBD-II diagnostic trouble code meaning: Cylinder 3 Oil Supply Solenoid Valve Driver Open Circuit. Common causes: broken wires to the solenoid, oxidation of contacts in connectors. Estimated repair cost: $28–83.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–83 (est.)

Symptoms

  • Check Engine light comes on
  • Possible slight reduction in engine power
  • Increased engine noise
  • Unstable operation at idle

Causes

  • Broken wires to the solenoid
  • Oxidation of contacts in connectors
  • Malfunction of the solenoid valve itself
  • Circuit fuse problems
  • Engine control unit malfunction

How to Fix

  1. Check the integrity of wiring and connectors
  2. Check the solenoid resistance (should be 10-30 ohms)
  3. Inspect contacts for corrosion
  4. Replace oil supply solenoid if necessary
  5. Check the condition of the fuses

Related codes

P103AP103CP103D

FAQ

What does the P103B code mean?

P103B is an OBD-II diagnostic trouble code that indicates: Cylinder 3 Oil Supply Solenoid Valve Driver Open Circuit

What causes a P103B error code?

The most common causes of P103B include: Broken wires to the solenoid; Oxidation of contacts in connectors; Malfunction of the solenoid valve itself; Circuit fuse problems.

How do I fix a P103B diagnostic trouble code?

To fix P103B: Check the integrity of wiring and connectors. Check the solenoid resistance (should be 10-30 ohms). Inspect contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P103B?

Limited driving only, diagnose soon

How much does it cost to fix P103B?

The estimated repair cost for P103B is $28–83. Actual cost depends on your vehicle, location, and labor rates.

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